<template>
  <div>
    <div class="model" v-show="model" @click="model = false">
      <div class="model-show">
        <img :src="modelSrc" alt="" />
      </div>
    </div>
    <p>例子</p>
    <div class="cut">
      <vue-cropper
        ref="cropper"
        :img="option.img"
        :output-size="1"
        output-type="png"
        :full="false"
        :fixed="false"
        :can-move="true"
        :can-move-box="true"
        :fixed-box="false"
        :original="true"
        :auto-crop="true"
        :auto-crop-width="320"
        :auto-crop-height="180"
        :center-box="true"
        :high="true"
        mode="cover"
        :max-img-size="99999"
        @real-time="realTime"
        :maxImgSize="4000"
      ></vue-cropper>
    </div>
    <div
      class="show-preview"
      :style="{
        width: previews.w + 'px',
        height: previews.h + 'px',
        overflow: 'hidden',
        margin: '5px',
      }"
    >
      <div :style="previews.div">
        <img :src="previews.url" :style="previews.img" />
      </div>
    </div>
    <div class="test-button">
      <label class="btn" for="uploads">upload</label>
      <input
        type="file"
        id="uploads"
        style="position: absolute; clip: rect(0 0 0 0)"
        accept="image/png, image/jpeg, image/gif, image/jpg"
        @change="uploadImg($event, 1)"
      />
      <a @click="down('blob')" class="btn">download(blob)</a>
    </div>
  </div>
</template>

<script>
import { VueCropper }  from 'vue-cropper'
export default {
  name:"part1",
  components: {
    VueCropper,
  },
  data() {
    return {
      model: false,
      modelSrc: "",
      crap: false,
      previews: {},
      option: {
        img: "https://photo-static.oss-cn-shanghai.aliyuncs.com/backgroud/bg_test.png",
      },
      show: true,
    };
  },
  methods: {
    realTime(data) {
      this.previews = data;
    },
    down(type) {
      // event.preventDefault()
      var aLink = document.createElement("a");
      aLink.download = "demo";
      // 输出
      if (type === "blob") {
        this.$refs.cropper.getCropBlob((data) => {
          this.downImg = window.URL.createObjectURL(data);
          aLink.href = window.URL.createObjectURL(data);
          aLink.click();
        });
      } else {
        this.$refs.cropper.getCropData((data) => {
          this.downImg = data;
          aLink.href = data;
          aLink.click();
        });
      }
    },

    uploadImg(e, num) {
      //上传图片
      // this.option.img
      var file = e.target.files[0];
      if (!/\.(gif|jpg|jpeg|png|bmp|GIF|JPG|PNG)$/.test(e.target.value)) {
        alert("图片类型必须是.gif,jpeg,jpg,png,bmp中的一种");
        return false;
      }
      var reader = new FileReader();
      reader.onload = (e) => {
        let data;
        if (typeof e.target.result === "object") {
          // 把Array Buffer转化为blob 如果是base64不需要
          data = window.URL.createObjectURL(new Blob([e.target.result]));
        } else {
          data = e.target.result;
        }
        if (num === 1) {
          this.option.img = data;
        } else if (num === 2) {
          this.example2.img = data;
        }
      };
      // 转化为base64
      // reader.readAsDataURL(file)
      // 转化为blob
      reader.readAsArrayBuffer(file);
    },
  },
};
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped lang="less">
.cut {
  width: 1500px;
  height: 500px;
  margin: 30px auto;
}

.c-item {
  max-width: 800px;
  margin: 10px auto;
  margin-top: 20px;
}

.content {
  margin: auto;
  max-width: 1200px;
  margin-bottom: 100px;
}

.test-button {
  display: flex;
  flex-wrap: wrap;
  align-content: center;
  justify-content: center;
}

.btn {
  display: inline-block;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  background: #fff;
  border: 1px solid #c0ccda;
  color: #1f2d3d;
  text-align: center;
  box-sizing: border-box;
  outline: none;
  margin: 20px 10px 0px 0px;
  padding: 9px 15px;
  font-size: 14px;
  border-radius: 4px;
  color: #fff;
  background-color: #50bfff;
  border-color: #50bfff;
  transition: all 0.2s ease;
  text-decoration: none;
  user-select: none;
}

.des {
  line-height: 30px;
}

code.language-html {
  padding: 10px 20px;
  margin: 10px 0px;
  display: block;
  background-color: #333;
  color: #fff;
  overflow-x: auto;
  font-family: Consolas, Monaco, Droid, Sans, Mono, Source, Code, Pro, Menlo,
    Lucida, Sans, Type, Writer, Ubuntu, Mono;
  border-radius: 5px;
  white-space: pre;
}

.show-info {
  margin-bottom: 50px;
}

.show-info h2 {
  line-height: 50px;
}

.model {
  position: fixed;
  z-index: 10;
  width: 100vw;
  height: 100vh;
  overflow: auto;
  top: 0;
  left: 0;
  background: rgba(0, 0, 0, 0.8);
}

.model-show {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100vw;
  height: 100vh;
}

.model img {
  display: block;
  margin: auto;
  max-width: 80%;
  user-select: none;
  background-position: 0px 0px, 10px 10px;
  background-size: 20px 20px;
  background-image: linear-gradient(
      45deg,
      #eee 25%,
      transparent 25%,
      transparent 75%,
      #eee 75%,
      #eee 100%
    ),
    linear-gradient(45deg, #eee 25%, white 25%, white 75%, #eee 75%, #eee 100%);
}

.c-item {
  display: block;
  user-select: none;
}

@keyframes slide {
  0% {
    background-position: 0 0;
  }
  100% {
    background-position: -100% 0;
  }
}
</style>
